[How important is it that the price of BTC is stable for extended periods, in order for BTC to be widely adopted and what are possible solutions to stabilize the volatility?]

How important is it that the price of BTC is stable for extended periods, in order for BTC to be widely adopted and what are possible solutions to stabilize the volatility?

Also, I believe BitPay and CoinBase remove this volatility for merchants by exchanging the BTC soon after a transaction is processed, does this not defeat the purpose of BTC? As such, the merchant should use the received BTC within their supple chain, but this can only happen if parties within the supply chain accept BTC. The volatility of BTC prevents this....

I placed a transaction without a fee, by accident, and it has not confirmed for 2 days whilst resting at 0% network propagation according to BlockChain.info. What is the usual process time for a tx without a fee?

I recently bought a few LTC, I want a little more. I want exactly 1 BTC worth of LTC at current prices. Only respond if you have a trusted and established reputation. Thank you

[JOB COMPLETED]

If a hacker gains access to a website and proceeds to vandalize the website, including changing the public-key of a BTC wallet, this would direct all payments to the hacker. Is this a security risk inherent to the use of BTC or is there something implemented that could prevent this? I am new to BTC/crypto-currency, so I don't fully understand all the details.